The diameter of the bulbs is approximately 12mm and overall length is 28mm

Each T10 LED bulb contains 5 Beautiful High Quality 5050 SMD LEDs, which are 90-Percent more efficient than incandescent and halogen lamps.

Besides of the beautiful color, these LED lamps also have longer lasting than stock tungsten lamps. Usually, a LED lamp has average of 50000 hours lifespan and it consumes less power as well. Also, unlike those blue color tungsten lamps, LED will never burn your wires nor melt the lamp covers.

Furthermore, these are SUPER EASY to install. There is no modification needed at all. All you need to do is to remove the lamp covers with a small flat screwdriver and direct replace the stock lamps with LED lamps. Since LED lamp has positive and negative terminals, so if there is no lighting after inserting it into socket, simply reverse polarity; change the terminal oppositely.